The Karkadann Triangle is a limited edition booklet (and ebook) containing two stories: "Unicorn Magic" by Patricia A. McKillip, otherwise unavailable; and "My Son Heydari and the Karkadann" by Peter S. Beagle, a story previously published in Beagle's collection The Overneath (2017). McKillip's tale is very slight. It concerns a unicorn who had battled a sorcerer, and the sorcerer managed to change the unicorn into a young woman and send her into the future. There really isn't much story to it beyond that. Beagle's story, on the other hand, is a real gem. It concerns a young Persian boy who against all reason saves a dying karkadann, a monstrous one-horned beast known primarily for killing things. Beagle's telling of the tale is near perfect.